Formulae and Substitution | Edexcel GCSE Foundation | 40 Worked Examples

A 40-question Foundation-tier pack on formulae and substitution for Edexcel GCSE Maths (1MA1), with fully worked, step-by-step solutions. Every working line is explained in plain English and annotated with the real Edexcel mark-scheme codes (B1, M1, A1), so students see exactly where each mark is earned. Questions build progressively from Easy to Challenging: substituting positive numbers into expressions and formulae, hidden multiply signs, powers, fractions and brackets, then negative-number substitution, writing a formula from a worded context, standard and scientific formulae (perimeter, area of a triangle, v = u + at, Celsius-to-Fahrenheit), and finishing with simple change of subject and substitute-then-solve problems in authentic Edexcel contextual style. Content is matched to the Edexcel 1MA1 Foundation specification (A2 substitution, A5 formulae): change of subject is kept to simple one- and two-step cases, since rearrangements where the subject appears twice are Higher-tier only. Ideal for revision, homework, cover lessons and one-to-one tuition. Print-ready PDF.